Description: RIC communication trouble. Communication error with RIC Error in communication line test after turning on the power or exiting from SIM.
Causes: Improper connection or disconnection of connector and harness RIC control PWB trouble Control PWB (ICU) trouble Malfunction caused by noises
Remedy: Turn off/on the power to cancel the trouble.
Code: U9 00
Description: Operation control communication trouble (ICU detection). Communication setup error, framing/parity/protocol error
Causes: Slave unit PWB connector improper connection Slave unit PWB – ICU PWB harness trouble Connector pin breakage of the motor PWB of the slave unit PWB Slave unit ROM trouble. no ROM, ROM reverse insertion, ROM pin breakage
Remedy: Connect the connector of the slave unit PWB and the ICU PWB. Check the connection and the harness. Check the grounding of the copier. Check the ROM of the slave unit PWB.
Code: U9 90
Description: Operation control communication trouble (OPE detection). Communication setup error/framing/parity/protocol error
Causes: Slave unit PWB connector improper connection Slave unit PWB – ICU PWB harness trouble Slave unit PWB mother board connector pin breakage
Remedy: Check the slave unit PWB and the ICU PWB connector connection. Check the copier earth.